Nut lock



May 28, 1929. RI F. GILLESPIE NUT LOCK Filed July 26, 1927 L ttornegPatented May 28, 1929.

UNITEE fiTATES RAY F. GILLESPIE,;OF HAMILTON, OHIO.

,nissa NUT LOCK.

Application filed. July 26,

My invention relates to nut locks of the base clutch type whereinfriction is utilized in connection with rollers and cam grooves in thenut or washer, for coaction with the part to be bolted, for the purposeof securing the nut in locked position. The invention is applicable foruse with a lock nut, as well as for use with a washer that is adaptedfor use with the usual or standard type of nut.

My invention consists in certain novel combinations and arrangements ofparts whereby the cam rollers are retained in operative position at alltimes, and whereby the cost of manufacture of a lock nut is reduced to aminimum, and the efliciency of the lock nut is enchanced.

In the accompanying drawings, I have illustrated two examples of thephysical embodiment of my invention, wherein the locking device is shownas forming part of a lock nut, and also as forming part of a lock washeradapted for use with a standard nut. These exemplifications show thebest modes I have so far devised for the practical application of theprinciples of my invention, but it will be understood that changes andalterations may be made therein within the scope of my claims, withoutdeparting from the principles of my invention.

Figure 1 is a face view of a locknut embodying my invention; 7

Fig.- 2 is an edge view of the lock nut partly broken away to disclosethe arrangement of the cam grooves and cam rollers;

Fig. 3 is a face view of a lock washer; Fig. 4: is an edge view of thelocl; washer; Fig. 5 is a face view of the base portion of the lock nut,or of the lock washer, with the cam rollers and retaining bridgesomitted;

Fig. 6 is a view showing one of the rollers; and

Fig. 7 is an end view of this roller. In carrying out my invention, Ihave illustrated a standard hexagonal nut 1 having the usual threadedbore 2, and provided with a circular base flange 3. In the face of thebase flange or base of the nut, I provide a series of spaced grooves teach having a cam wall 5 to form biting faces for the lock nut. In theface of the base, I provide an annular groove 6, and this groove isfilled with a ring I or band 7 fashioned of music wire, or othersuitable material, and this band of wire, where it crosses the grooves,forms retaining bridges as 7. Preferably. the material of theseretaining bridges is somewhat resilient 1927. Serial No. 208,486.

by a hammer to spread the material of the wire or band into the face ofthe base of the washer, and in this manner the retaining bridges areheld across the cam grooves.

Before the retaining ring is fastened in i the face of the base, the camrollers 9, are placed in their respective grooves, andeach cam roller isprovided with an annular groove -7 10 across which the bridge 7 of theretaining ring or band extends. Thus the cam rollers are retainedintheir grooves and designed to roll up on the cam faces 5 to causefrictional engagement with a support, when the lock nut is screwed homeon a. bolt. I

In Figs. 3 and 4, a washer ll is shown, and this washer is provided withthe grooves 4t, cam faces 5, the retaining ring 7 forming the retainingbridges 7 and the same fric tion rollers 9 are used as in Fig. 1 Inaddition, the washer is provided with spurs or studs 12 that may engagethe face of the standard nut, or of the object being bolted, and theaction of the cam rollers 9 in con nection with thewasher is the same asthe cam action of the rollers with the lock nut. In Fig; 5, the numeral13 indicates a steel ring or band that may be shrunk or other wiseattached on the washer or on the circular base of the nut. The camgrooves 4 and their cam faces may thus be fashioned in the face of thewasher or of the base of the nut, before this ring 13 is shrunk orwelded on the washer or nut, and in this manner the grooves 4 may befashioned with simplicity and rapidity. The rollers 9 are looselyretained inthe mortices or grooves 4 until the cam action is broughtinto play, and then the rollers are free to rollup on the cam face 5 andare guided by the retaining bridge 7 Thering or band 7 is enclosedwithin the groove 6 as indicated in Fig. 2, .and the band does notprotrude beyond the face of the nut base or of the washer. Theretaining-bridgeis forced out from the face of the. washer or base ofthe nut, as the cam roller frictionally engages the surface of theobject being bolted, but inasmuch as the roller projects beyond thebridge, the bridge does not interfere with the action of the roller. s

As before stated, various changes and alterations may be made in theconstruction of iny lock nut Within the scope of my claims withoutdeparting from the principles of my invention.

Having thus fully describedniy invention, What I claim as new and desireto secure by Letters Patent is 1. A look nut having an annular groove inthe face of its base, and spaced cam grooves in said face, a band ofresilient material in said annular groove forming bridges across the camgrooves, and friction rollers in said cam grooves having annular groovesreceiving sa1d bridges. p

2. A look nut having an annular groove and intercepting cam grooves in'the face of its base, friction rollers in said cam grooves havingannular grooves, a resilient wire in said annular groove formingretaining bridges for the grooved friction rollers, and means forsecuring the Wire in the annular groove.

RAY F. GILLESPIE.

